/* === Фон всей страницы === */
.page-background {
  position: relative;
  min-height: 100vh;
  background-size: cover;
  background-position: center;
}
.page-overlay {
  position: absolute;
  top:0; left:0; right:0; bottom:0;
  background: rgba(255,255,255,0.7); /* светлая тема */
}
html.theme-dark .page-overlay {
  background: rgba(0,0,0,0.7); /* тёмная тема */
}
.page-content {
  position: relative;
  z-index: 2;
}

/* === Секции === */
.section-block {
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-radius: 12px;
  padding: 2rem;
  background: rgba(255,255,255,0.8);
}
html.theme-dark .section-block {
  background: rgba(30,30,50,0.8);
}

/* === Параллакс для разделов === */
.theme-section-parallax {
  position: relative;
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  color: #fff;
  border-radius: 12px;
}
.theme-section-parallax .overlay {
  position: absolute;
  top:0; left:0; right:0; bottom:0;
  background: rgba(0,0,0,0.55);
  border-radius: 12px;
}